UNIVERSITY PARK, Pa., Sept. 16 -- Pennsylvania State University issued the following news release:
UNIVERSITY PARK, Pa. - A study led by Penn State researchers suggests that recycled concrete aggregate and an iron-rich byproduct of steel production could help treat acid mine drainage, the toxic runoff that pollutes thousands of miles of streams in Pennsylvania and other coal-mining regions.
The research, published in Mine Water and the Environment, evaluated whether recycled concrete aggregate (RCA) and an iron-rich material (IRM) could replace or supplement limestone, the standard material used in many systems that treat acid mine drainage. The findings, according to the researchers, suggest RCA could be a viable alternative in some loc...